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Finding the Fourth Proportional to 127,806.80, 191,710.20 and 108,123.80

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Solution

The fourth proportional to 127,806.80, 191,710.20 and 108,123.80 is: 162,185.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,806.80 : 191,710.20 = 108,123.80 : x
  2. Step 2: Convert to fraction form
    127,806.80/191,710.20 = 108,123.80/x
  3. Step 3: Cross multiply
    127,806.80x = 191,710.20 × 108,123.80
  4. Step 4: Simplify right side
    127,806.80x = 20,728,435,322.76
  5. Step 5: Solve for x
    x = 20,728,435,322.76/127,806.80
  6. Step 6: Final answer
    x = 162,185.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.